Boiler



E. ASH.

BOILER APPLICATION FILED MAYH. 1920.

Patented Mar. 7, 1922.

mental a SHEETS-SHEET 1.-

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some APPLICAHON FILED MAY HI 1920.

Patented Mar. 7, 1922.

3 5HEETS-SHEET Z- q/oilmeoo I ELVIN ASH, F BERKLEY, VIRGINIA.

' BOILER.

Specification of Letters Patent.

Patented Mar. 7, 1922.

Application filed. May 11, 1920. Serial No. 380,499.

To all whom it may concern:

Be it known that 1, Emmy Asrr, a citizen of the United States, residing at Berkley, in the county of Norfolk and State of Virginia, have invented a new and useful Boiler, of whichthe following is a specification.

This invention relates to locomotive boilers, one of its objects being to providea boiler the firebox of which can be readily removed for repairs, the boiler being constructed without the use of bolts and the various walls of the firebox being coupled throughout their length to the shell of the boiler by means of connecting stays.

A further ob ect 1s to provlde a-boiler in which the crown sheet is so shaped that should the water in the boiler drop to a predetermined level, sealing plugs provided in the sheet will be melted so as to permit water to flow into the firebox and extmguish the fire.

Another object is to provide simple and efficient means for connecting the walls of the firebox and the boiler shell, and for connecting the firebox to the front plate of the boiler. r i V A still further object is to provide improved means for connecting the boiler tubes to the flue plate. 7 I

With the foregoing and other objects in view, "which will appear as the description proceeds, the invention resides in the combination and arrangement of parts and in the details of construction hereinafter described and claimed, it being understood that, within the scope of what is claimed, changes in the precise embodiment of the invention shown can be made without departing from the spirit of the invention.

In the accompanying drawings the preferred form of the invention has been shown. r l

In said drawings-.-

Figure 1 is a vertical longitudinal section through a portion of a boiler having the present improvements combined therewith. Figure 2 is a front elevation of the boiler with the front plate removed.

Figure 3 is an enlarged endelevation of a pair of connecting stays.

Figu e 4,: is an enlarged face View f a portion of the flue plate and showing the means for attaching a flue thereto.

Figure 5 is a section on line 5-5, Figure 4. Flgure 6 is a horizontal section through the boiler on line 6-6, Figure 2.

Referring to the figures by characters of reference; 1 designates the firebox the crown of which is depressed or conc aved transversely as shown at 2 and provided with rounded sides 3. These roundedportions are protected longitudinally by means of guard strips 4: fastened to the side walls 1 and to the crown sheet by rivets or the like andwhich prevent the flames and heat from coming directly into contact with said rounded portions. At desired points in the crown sheet adjacent the center thereof are plugs 5 of metal which will melt before the crown sheet can burn, these plugs being adapted to melt out shouldthe water reach such a low level as to leave the crown unprotected.

The flue plate 6 at the rear end of the firebox has a series ofbosses 7 brazed or otherwise secured thereto, these bosses receiving the front ends of the fines 8. Each of the bosses has recesses extending into the peripheral portion thereof to receive the heads of rivets 10'which are used for fastening the fines to{ the bosses. By cutting these rivets the lines can obviously be removed readily.

Secured to the sides and top of the firebox are coupling ribs or stays 11 which extend throughout the length of the firebox and are attached thereto by rivets. Each of these ribs has its outstanding flange 12 provided alongopposite sides with beads 13 adapted to dove-tail into corresponding grooves 14. formedin the parallel walls of a channeled receiving member 15 riveted to the inner surface of the boiler shellor casing,..1 6 The ribs or stays areof different lengths,thoseat the sides being shorter than those at the to and the top stays diverging outwardly an upwardly as shown so as i properly to supportand spacethe crown 2 off the firebox. The parts are so arranged,

, owever, that theribs 11 can be inserted longltudinally into the channeled members 15 and Wh n th se ribs 11 are riveted to the slidably engaged by short rib members 18' attached to a plate 19 which is l'lVBilBdiiO firebox 1 and the members 15 are riveted to the shell or casing 16, said firebox and casing will be held 1n proper relation to each 7 other and the various parts of the boiler will be properly braced and supported 7 Secured upon the flue sheet or plate'fi are vertically disposed .channeled members 17 similar to the members 15 and adapted to be the bottom of the boiler as indicated at 20'.

A flange 21 extends outwardly alon the front edge of the boiler casing or shel and s ngage y a h nneled ex en ion 2 formed along a flange ,22 which extends baokwardly from the front late 23 of the boiler. Rib members 24s simi ar to the members 18 are secured to and extend vertically upon the front face of the firebox and are slidably engaged by channeled members 25 secured to the inner side of the front, plate 23. Braces 26 are arranged obliquely within the front portion of the boil r and are prov ded with attaching plates 27 riveted to the casing or shell of the boiler and with additional plates 28 riveted to. shortstays 24 slidably engaged with a short receiving member 25 riveted to thefrontportionflof the boiler. .r V In assemblin the parts the firebox is slipped longitu inally into the boiler SQ that the spacing ribs and channeled members will slide longitudinally into engagement with each other where located along the sides and top of the parts; The plate 19 then elevated so as tobring the stay member 18 in o ng g m nt with t e s ay member 17 after which said plate is riveted place as shown at 20; A cotterpin 2 9 be in:

ss d th ug he e nt rfitting' member 17 nd 18 Q as to ho th m against relative" movement, The front plate 23 is then lowercd'so as to bring the channeled extension 21 into engagement with the flange at. the front end of the shell or casing of the-boiler and during this lowering of the front plate he st y m mbers 2 and 2 w l m re into shown and, if desired, the interfitting ch engagement with each other and can suhse: quently be fastened by means of'a cotter pin 30. The braces 26, which extend down ivardly and forwardly from the shell or asing re l re to hem b g as 1 1 an flan e her n an be fastened gether by rivets as shown.

To emo he fi b x it b c m m rely necessary to out the rivets so as to allow the front'plate to belifted out of position, The

p 1 n h n vbe e ac d and lowere after which'the firebox can'be moved'forwe rdly out of the boiler,it of course being whi hsilsage being easily reached by a tool inserted into the recesses 9. I

What is claimedis: I 1. The combination with a boiler shell and stay members extending longitudinallyalongl the walls'and top thereof, of a firebox ill-q sertible longitudinally into the shell, stay l having outstanding flange at one end, and longitudinal stay members upon thetop and walls of the shell, of a fireboxinsertible longitudinally into. the shell, stay members thereon-movable int engagement with the stay e bers on the shell "during the insertion of the firebox to tie the firebox and shell together, a front plate. movable to position across the open end of the shell and into engagement with the flange thereon and cooperating" stay members upon the front end of the firebox and upon the shell for engagement with each other during the positioning of th front plate to tie the front plate to the firebox, v

3. In a boiler the combination with a shell having longitudinal stay members, of a fire box insertible longitudinally'into the shell and having agfiue plate, stay members upon the flue plate. stay members upon the sides and top'of-the firebox and insertible into engagement with the stay members infthe shell'duringthe insertion of the firebox. to tie the'firebox and the shell together, a plate attachable to the boiler, stay members can ried thereby and movable into engagement, with the stay members on the flue plate, a front plate movable to positionacross one end of thefshell and into engagement with the firebox and upon the front fp'late,fsaid members being movable into engagement with each otherduring the placing of the front plate to tie said plate to itlie lirebox, and braces diagonally disposed within the shell'and attached'to the shell and frontplate.

in testimony that lclairn vthe foregoing "tr via Asa-1f ll itnessesf r l R. C. Dav-Is.

2. In a boiler the combination with a shell .7

7110 said shell, stay melnbersupon the front of l r s is asimy own, I have hereto affixed my signa- I ture n the presence of two witnesses! 

